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hgeisteh' Q lih stent tgg tisep fi eness menisc wen we enemies 'Pinnsn Dunno, .m, on PARIS, FRANCE.

Lem gamete. 1,709, dated Sewer 1, 1868.

- th s tl1tblllt rtitti'tii in in time h tters ifiatntt nut melting gm iii-tire same.

TO A WHOM IT MAY eon CERN: Be itknown that we, An onnnnlrn'nnn Vrnn and CESAIRE Prnnnn Dnsno, Jr., both of Paris, France, have i'nn enteda. newend useful Improvement in Bleaching :fnd Dyeing Feathers; and we do hereby declare that I the follewing iseegull,clear, and exact description thereoflnhich will enable others skilled in the art to fully u'nders'tandand-meke useof the same.- I

, :IThe ohjeQt Of. this .nv'ent'ion is to bleach feathers of ostriches, vultures, and other birds, which are naturally either-black, btOfil't, grey, or of'cther more or less tawny color or hue, and which heretofore heve'heen used in trade only'in theirnatug-alcolors, or dyed black. 7 'Oiii'inventionconsists in first removing the natural color of the above-named feathers, rendering them quit e drinritirly white, and afterwards dyeing them in any desired color or colors by any known process. l'n-csrrlying-ont'our inventio'n, We proceed as follows: Q 7 v 1 Fin-st, We Buhjeetthe fen-thers to e blecching proe'ess,'either by the action of chlorine in the gaseous form ic sin solu'tion','or by mens of chlorine salts, or by the action of sulphurous acid in n. gaseous fern: or in solution, cr hy'sulphi'tes, or by'chrornetes, bichx'omates, or oxygen salts and acids, or, in some cases, by alkalies, such as '0di1, potash, x1e, allof: filial metei' iuls mny be applied separately; or in succession", or even simultaneously. The best result website ever obtained, however, is effected by dipping the feathers into a. weak solution of nitric .e'qid,.wbich is mixe'd.yvith ch 'oniate or bichromztte of potash. By the action of this bath, the feathers are deprivedof their ccloi, the carbon end coloring-nnattcr contained in the vanes and ribs being burnt oil, so that saitl' festhers turn white, or suificie-ntly so to he submitted after washing to any we'll-known dyeing process.

I We ere swat-e that white feathers have before: been dyed to any desired color, and we do not claim this processes our invention; but

What we clnim'as new, and desire to secure by Letters Patent, is V p The within-described process of treatinghlaclt, grey, brown, or otherwise tawny-colored feiithers, by first subjecting themto a. bleaching, and afterwards to a. dyeing operation, substantially as and for the purpose set forth:

' ADOLPHE PIERRE VIQL,

OESARE PIERRE DUFLO.

Witnesses EDWARD Tucx, Lsvmri'nn. 

